The Bently Nevada 991-01-XX-01-00 MOD: 288865-01, also cataloged as the 991-01-XX-01-00 Thrust Transmitter, operates as a dedicated hardware component for axial shaft position measurement within Bently Nevada TSI monitoring systems.
Hardware Specifications
Parameter
Specification
Model
991-01-XX-01-00 MOD: 288865-01
Brand
Bently Nevada
Product Type
Thrust Transmitter
Origin
USA
Weight
0.5 kg
Dimensions
10 x 7.4 x 6 cm
Operating Temp
-35 deg C to +85 deg C
Power Consumption
+12 to +35 VDC input at transmitter terminal
Input Signal
3300 NSv non-contacting proximity probe system
Output Signal
4-20 mA proportional thrust position signal
System Length Option
5.0 meters / 7.0 meters
Mounting Option
35 mm DIN-rail clips
Agency Approval
Not required
Current Limiting
23 mA typical
Eddy-Current Probe Scaling and Thrust Position Measurement
The 991 Thrust Transmitter processes displacement signals from a Bently Nevada eddy-current proximity probe system. The transmitter scales probe output into a proportional 4-20 mA current signal representing axial shaft position.
The module uses gap voltage validation to maintain probe operating conditions, with standard Bently Nevada probe systems typically referenced around -10 VDC target gap voltage. The signal conversion maintains measurement consistency for thrust monitoring applications.
The transmitter architecture supports rotor dynamics analysis by providing continuous axial displacement feedback. Internal signal conditioning reduces measurement interference and supports cross-talk suppression when installed with adjacent proximity measurement channels.
Frequently Asked Questions
Q: What input device is compatible with the 991-01-XX-01-00 Thrust Transmitter? A: The transmitter accepts input from a Bently Nevada 3300 NSv non-contacting eddy-current proximity probe system.
Q: What mounting method is specified for this transmitter model? A: The model uses 35 mm DIN-rail clips for mechanical installation.
Q: What power supply range is required for operation? A: The transmitter requires a +12 to +35 VDC input applied at the transmitter terminals.
Field Installation Guidelines
Install the transmitter on a suitable 35 mm DIN-rail mounting structure with adequate mechanical support. Maintain separation between probe signal wiring and high-current power cables to reduce electrical interference.
Connect the proximity probe system using shielded instrumentation wiring where required by the installation environment. Apply correct cable routing practices and connect cable shields according to plant grounding standards.
Verify the probe gap voltage before commissioning the measurement loop. Confirm the 4-20 mA output response and ensure the connected monitoring system is configured for the correct thrust position scaling.
